买语文书30本,数学书24本,共花41.7元,已知每本语文书比数学书贵0.22元.求每本语文书的单价.(方程)

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  • 设每本语文书x元,则每本数学书(x-0.22)元

    30x+24(x-0.22)=41.7

    30x+24x-5.28=41.7

    54x=46.98

    x=0.87

    答:每本语文书0.87元